Answer the following statements true (T) or false (F)
1. In the evolution of plants, wood appeared before seeds.
2. Ginkgo trees and humans have similar chromosomal sex-determination systems.
3. The fossil record shows that pollen cones of conifers have become increasingly complex through their evolutionary history.
4. All gymnosperms are wind-pollinated.
5. Some conifers shed their leaves seasonally.
1. TRUE
2. TRUE
3. FALSE
4. FALSE
5. TRUE
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Aneuploidy is the term for a condition in which cells have ________
a. too few complete sets of chromosomes b. too many or too few copies of a single chromosome c. three or more complete sets of chromosomes d. a translocation resulting in a deletion and a duplication
The repeating units of muscle contraction are called myofibrils
____________________ Indicate whether the statement is true or false.
Using the techniques of genetic engineering, you design a protein you want to accumulate within the ER of yeast cells. To accomplish this goal, you need to
A) do nothing; all proteins go through the ER. B) incorporate appropriate mannose-6-phosphate groups. C) incorporate the appropriate DNA sequence(s) to create signal sequences in the mature peptide. D) incorporate radioactive amino acids into the protein. E) remove the N-formyl group located at the N-terminus of the polypeptide.
6H2S + 6CO2 6S0 + glucose
A) takes place under aerobic conditions. B) takes place under anaerobic conditions. C) The amount of oxygen does not make any difference.